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? asked in Science & MathematicsMathematics · 3 years ago

(5a^-3)^4(a^5)^-3?

I know the answer is 625/a^27 but I am not sure how you get the 625

2 Answers

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  • Como
    Lv 7
    3 years ago

    5^4

    ---------------

    a^12 x a^15

    625

    -------

    a^27

  • Morningfox
    Lv 7
    3 years ago

    5^4 is 625.

    You don't "know" what the answer is, until you can do it yourself. You might know what the teacher says is the answer, but teachers have been known to be wrong sometimes.

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